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(No Model.) 2 Sheets-Sheet l.

G. LAURENCE. APPARATUS FOR RAISING, LOWERING, AND DETAGHING BOATS. No. 252,480 Patented Jain. 17,1882.

W A{ v ao rfyljjince u versus, rham-imw n lw, Winllington. u c

(No Model.) 2 Sheets-Sheet 2.

G. G.-LAURENOE.

AND DETAGHINGBOATS.

Patented Jan. 17,1882.

APPARATUS FOR RAISING, LOWERING,

Non

Even/ ag n alau'rence.

n. PETERS, Pholmhlhogmphcr. wnhin u-n, 04 c.

UNITED STATES THOMAS BLYTH,

GODFREY G. LAURENCE, OF LONDON, ENGLAND, ASSIGNOR TO PHILIP or SAME PLACE.

'APPARATUS FOR RAISING, LOWERING, AN\D D.ETACHING BOATS.

SPECIFICATIONforming part of Letters Patent No. 252,480, dated January 17, 1882.

Application filed August 1-0, 1881. (No model.) Patented in Englaud June 2 4, 1 876, in France August 3, 1878, and in Belgium March 11', 1am.

To all whom it may concern Be it known that I, GODFREY GIOVANNI LAURENCE, of London, En gland, have invented new and useful Improvements in Apparatus for Lowering, Disengaging, and RaisingShips Boats and for Similar Purposes, (For which I have obtained a patent in Great Britain, No. 2,605, hearing date June 24, 1876, in France, No. 125,970, hearing date August- 3, 1878, and in Belgium, No. 47,618, hearing, date March 11, 1879,)of which the following is a specification,

reference beinghad to the accompanying drawings.

' My invention relates principally to the 'davits employed in the raising and lowering of ships" boats, and has for its object to facilitate such operations, and also to enable boats to be readily stowed without disconnection from the davits. These objects I accomplish by the mechanism illustrated in the accompanying d'rawin gs, in which-- ,Figure 1 represents an tlevation of the invention applied to a ship or vessel, a portionof the latter being shown in section; Fig.2, a plan view of the same; Figs. 3 and 4;, detail views of the standard which supports the falls for raising or lowering the davit; Figs. 5 and 6', detail broken views of the davit; and Fig. 7, a view similar to Fig. 1, on an enlarge d scale. In these figures, A is a portion of the upper deck of a vessel. B indicates a ship's boat,

side of the vessel.

and O G are the. said improved davits. The form and construction of each davit will be more clearly understood by referenceto Figs. 5 and 6, Fig. 5 being taken on the same plane as Fig. 1,,and, Fig. 6 on a lgl he at right angles therewith. In both figures, for obvious reasons, the davit is represented as broken. The

sidewise and inward, the two davitjs being formed right and left-that is to say, the upper ends of the two davits project toward each other. A head, (Z, is formed on the upper end of each davit. Each head is formed to receive a sheave, e, and is also formed and fitted with a pair of jaws, D. One jaw,f,is fixed, being formed in one piece with the head, or being firmly fixed thereto, and the other jaw, g, is hinged at h to the said head. A shackle, i,

is formed to slip over the twoja-ws, and isformed.

with an eye for attachment to a fall, k. The end of the said fall in the case of each davit is attached to a spring lllOk, which hooksinto the said eye. The said hook is of the ordinary safety-hook form, but, if not considered to be necessary an ordinary form of hook may be employed; or the said shackle may be otherwise connected with the end ofthe fall by any suitable means.

When using in any part hereof the term fall I must be understood to mean any appliance suitable for my pnrposessuch, for ex-,

ample, as a rope of wire, hemp, or other suit able material, or a chain, The t'all'k passes over the sheave c, and also over one of two sheaves, which are mounted in the head of a \standard, E, which is secured to a skid-beam, l. The said standard is represented by Figs. 3 and 4 in Sheet 2, wherein in m are the two sheaves which are mounted in the head of the standard. The form of this standard is not material, as the sheaves may be carried by any suitable standard, bracket, or framing fixed to any suitable part of the vessel; The

fall I; is led from ,the said standard to a winch, or to a suitable form of. apparatus for obtaining' a purchase. The said winch is fixed 111 any suitable position on deck, or isfixed to a post, beam, or part'of the vessel, and if nec- I essary or advisable the said fall is led over or through other sheaves or blocks to the said winch.

The two falls it from both davitsare led to the same winch or purchase, or to-winches or purchases connected together or arranged to act in unison, the intention being that both falls shall be let out or hauled home simultaneously, and as much as possible to anequal extent. One end of a second fall, n, is attached to an eye formed on the davit at 0, or

is otherwise secured to or connected with the upper part of the davit. Thisfall is led over the other of the two sheaves m, and is attached by the other or inner end to a ring-bolt or to a fixed part of the vessel, or is-led through a dead-eye or block, or is otherwiseso arranged that it can be lengthened or shortened, and can be secured or made fast to a-fixed point, or, theends of the fails a fromboth davits may. be connected. In the drawings the inner end ofthefall n is represented as beingtied to aring-bolt secured to the skid-beam.

Thejaws D are so suitably formed that when closeda link,p, can hangfreely within thejaws andbe retained therein so long as the movable jaw-isclosed against the fixed jaw. The said linkiseonnected by means of ashortchaiu with, aneyebolt attached to the end of theboat, or is otherwise. connected with the boat, As

' there is a correspondingarrangement in all'respectssin connection withboth davits the boat is suspended between the two davits, as indicatedin Fig.2, the inward projection of. the dayit-heads permittingthe boats to swin gelear between the two davits whenthey are hauled. inboard. Inlieu. of the-said inward projec: tion,.th'e'davits maybe curved to pass below and. behind theboat when, theboat is stowed It will be seen that when so suspended the weight of the-boat is sustained bythe hinged jaws,and that when these jaws are permitted toopen the boat will be released.

To prevent the jaws from opening when not required to open, I employ awed ge, 1', wh-ichis inserted into the shackle above the fixedjaw but I'do not confine myself to this arrangement, as a pin or any other suitableappliance maybe adopted in-lieu of. the wedge, audit is possibleeto dispense with theuse ofsuch an appliance.

The method of loweringthe boat may be described in mannerasfollows: I will suppose. the boat tohave been unshipped from-the skidbeams, and pushed oif so that thedavits are: kept from falling outward by the falls .k 70.-

\ The-said falls are now-slackened oft, and'the davits are-thereby permitted to fall.outw.ard,;-

thelower ends turning. on their hinges and swingingntheboatlwell out and clear of the1 ships side. As theupper ends of the davits move-over, the loose wedges r fall out of or are.- drawnpout ot'the shackles; but aslthe strain '1, the fallsn being so adjustedin length that they will tighten when the boat is low enough to be released. The lowering of the boat continuing, the falls u take the load,,wh ereby the falls '70 slacken, and the closing strain being 7 taken off the movable jaws, they are no longer able to sustain the load, and the boat is released and drops into the water, as indicated by the full lines in Fig. 1. According to this method, and supposing the falls'n to have been adjusted at some previous time, it would be simply necessary to run, out the falls 70 until the boat became released by the tightening of the fails a; but this method may-be variedas, forexample, both sets of falls mayberun: out, and when the boat has been lowered sufliciently the fallsn may be hauled tight. The:

falls '70 .beingthen slaekened or let oft, the boatwould immediately be released. When the boatis to beraised the davits are lowered.un.--

til thelinks p can. be shipped within thejaws,

which'arekept closed until the fallsktake the strain,-.and. the said falls are then hauled in, so as to bring home the davits which swing;

the boat aboard and land it on the-skid-beams.

Thesai'd jaws may be kept closed during the hauling. in by in'sertingthe wedge in; the

shackle, audit may be of advantage to em-.

ploy a pin or other contrivancetokeep the said wedge fromefallinguout while, theboat is being, raised. Other methods of workingthe davits may be preferred to the methods hereinb'et'ore described-as, for example, whenlraising theboat the safety-hooks may be hooked.

intorings attached to the boat, and the boat be .raised byhaulingiu, thefalls k, as :before.- Inssuch-acasel should prefer to ship the'links' pinto the jaws beforelandingthe boat on the-- skidbe-ams. Thismay be effected .bytightem IEO ing:..the.fallsa, so asto take-the weight-of the load and davits. Thesaid links may thenbe shippedflhe wed gesbe iuserted inthe shackles,

andNthesafety-hooksbe hooked intothe'eyes A onthe shackles.

Various'other modifications may be madein the formsyot the parts than those herein indi-i cated,so-long;as.the main feature of my inven 'tion-is: retained-namely, the holding jawor jaws :kept closed by the strainupon the fall em.-.

ployed. toraiseand-lowerthe load, and which? is or arepermitted to open, so asto release the boat.by transferring,the saidstraiuto a secondffall.v

What I claim is- 25 1. The-combination, with the vertically swingin g davit-,g of the sheavev arranged in. its M head, the j aws' f g, the shackle arrangedtobet slipped-saver the said jaws, and the. fall. con; nected with the said shaekleand passingover the shc ave in the head of the davit, substrutially as described. i 2.. In an apparatus for raising and lowering ships"b0ats, the combination, with the verti- 5 (zany-swinging davits G and the standards E, of the falls k and n, the heads d, provided with the jaws fg, the shackle i, with a wedge, 1',

arranged between it and the jaw f, and the link p, all substantially as above set forth, and for the purposes specified. V

GODFREY GIOVANNI LAURENCE. Witnesses:

WILLIAM Gaoss, LEWIS SANDERSON. 

